Method for measuring social relationship using heart rhythm pattern (HRP)

A social relationship determining method comprising:

• detecting, with an electrocardiogram (ECG) sensor, ECG signals from at least two subjects;
• defining, with a data processor, a heart rhythm pattern (HRP) data spectrum including a beat per minute (BPM) from the ECG signals of the at least two subjects;
• extracting, with the data processor, a difference X value between the beats per minute (BPM) of the heart rhythm pattern (HRP) data spectrum of the at least two subjects defined from the ECG signals;
• extracting, with the data processor, an r square value via a correlation analysis of each of the HRP data spectrum;
• determining, with an analyzer configured for estimating intimacy coupled to the data processor, a social relationship between the at least two subjects by using the following equation:
• Y=0.00943167*X, where Y is a result value, wherein the social relationship is determined as being strong when the r square value is larger than the result value Y, otherwise, the social relationship is determined as being weak;
• and
• displaying, with a display coupled to the data processor, a strength of the social relationship based on a comparison of the result value Y with the r square value.